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<a name="settings-ip-tunnel"></a><div class="titlepage"></div>
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<h2>ip-tunnel</h2>
<p>ip-tunnel — IP Tunneling Settings</p>
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<div class="refsect1">
<a name="id-1.3.3.19.2"></a><h2>
            Properties
        </h2>
<div class="table">
<a name="id-1.3.3.19.2.2.1"></a><p class="title"><b>Table 53. </b></p>
<div class="table-contents"><table class="table" border="1">
<colgroup>
<col>
<col>
<col>
<col>
</colgroup>
<thead><tr>
<th>Key Name</th>
<th>Value Type</th>
<th>Default Value</th>
<th>Value Description</th>
</tr></thead>
<tbody>
<tr>
<td><pre class="screen">encapsulation-limit</pre></td>
<td><pre class="screen">uint32</pre></td>
<td><pre class="screen">0</pre></td>
<td>How many additional levels of encapsulation are permitted to be prepended to packets. This property applies only to IPv6 tunnels. To disable this option, add NM_IP_TUNNEL_FLAG_IP6_IGN_ENCAP_LIMIT (0x1) to ip-tunnel flags.</td>
</tr>
<tr>
<td><pre class="screen">flags</pre></td>
<td><pre class="screen">uint32</pre></td>
<td><pre class="screen">0</pre></td>
<td>Tunnel flags. Currently, the following values are supported: NM_IP_TUNNEL_FLAG_IP6_IGN_ENCAP_LIMIT (0x1), NM_IP_TUNNEL_FLAG_IP6_USE_ORIG_TCLASS (0x2), NM_IP_TUNNEL_FLAG_IP6_USE_ORIG_FLOWLABEL (0x4), NM_IP_TUNNEL_FLAG_IP6_MIP6_DEV (0x8), NM_IP_TUNNEL_FLAG_IP6_RCV_DSCP_COPY (0x10), NM_IP_TUNNEL_FLAG_IP6_USE_ORIG_FWMARK (0x20). They are valid only for IPv6 tunnels.</td>
</tr>
<tr>
<td><pre class="screen">flow-label</pre></td>
<td><pre class="screen">uint32</pre></td>
<td><pre class="screen">0</pre></td>
<td>The flow label to assign to tunnel packets. This property applies only to IPv6 tunnels.</td>
</tr>
<tr>
<td><pre class="screen">fwmark</pre></td>
<td><pre class="screen">uint32</pre></td>
<td><pre class="screen">0</pre></td>
<td>The fwmark value to assign to tunnel packets. This property can be set to a non zero value only on VTI and VTI6 tunnels.</td>
</tr>
<tr>
<td><pre class="screen">input-key</pre></td>
<td><pre class="screen">string</pre></td>
<td><pre class="screen"></pre></td>
<td>The key used for tunnel input packets; the property is valid only for certain tunnel modes (GRE, IP6GRE). If empty, no key is used.</td>
</tr>
<tr>
<td><pre class="screen">local</pre></td>
<td><pre class="screen">string</pre></td>
<td><pre class="screen"></pre></td>
<td>The local endpoint of the tunnel; the value can be empty, otherwise it must contain an IPv4 or IPv6 address.</td>
</tr>
<tr>
<td><pre class="screen">mode</pre></td>
<td><pre class="screen">uint32</pre></td>
<td><pre class="screen">0</pre></td>
<td>The tunneling mode. Valid values: NM_IP_TUNNEL_MODE_IPIP (1), NM_IP_TUNNEL_MODE_GRE (2), NM_IP_TUNNEL_MODE_SIT (3), NM_IP_TUNNEL_MODE_ISATAP (4), NM_IP_TUNNEL_MODE_VTI (5), NM_IP_TUNNEL_MODE_IP6IP6 (6), NM_IP_TUNNEL_MODE_IPIP6 (7), NM_IP_TUNNEL_MODE_IP6GRE (8), NM_IP_TUNNEL_MODE_VTI6 (9), NM_IP_TUNNEL_MODE_GRETAP (10) and NM_IP_TUNNEL_MODE_IP6GRETAP (11)</td>
</tr>
<tr>
<td><pre class="screen">mtu</pre></td>
<td><pre class="screen">uint32</pre></td>
<td><pre class="screen">0</pre></td>
<td>If non-zero, only transmit packets of the specified size or smaller, breaking larger packets up into multiple fragments.</td>
</tr>
<tr>
<td><pre class="screen">output-key</pre></td>
<td><pre class="screen">string</pre></td>
<td><pre class="screen"></pre></td>
<td>The key used for tunnel output packets; the property is valid only for certain tunnel modes (GRE, IP6GRE). If empty, no key is used.</td>
</tr>
<tr>
<td><pre class="screen">parent</pre></td>
<td><pre class="screen">string</pre></td>
<td><pre class="screen"></pre></td>
<td>If given, specifies the parent interface name or parent connection UUID the new device will be bound to so that tunneled packets will only be routed via that interface.</td>
</tr>
<tr>
<td><pre class="screen">path-mtu-discovery</pre></td>
<td><pre class="screen">boolean</pre></td>
<td><pre class="screen">TRUE</pre></td>
<td>Whether to enable Path MTU Discovery on this tunnel.</td>
</tr>
<tr>
<td><pre class="screen">remote</pre></td>
<td><pre class="screen">string</pre></td>
<td><pre class="screen"></pre></td>
<td>The remote endpoint of the tunnel; the value must contain an IPv4 or IPv6 address.</td>
</tr>
<tr>
<td><pre class="screen">tos</pre></td>
<td><pre class="screen">uint32</pre></td>
<td><pre class="screen">0</pre></td>
<td>The type of service (IPv4) or traffic class (IPv6) field to be set on tunneled packets.</td>
</tr>
<tr>
<td><pre class="screen">ttl</pre></td>
<td><pre class="screen">uint32</pre></td>
<td><pre class="screen">0</pre></td>
<td>The TTL to assign to tunneled packets. 0 is a special value meaning that packets inherit the TTL value.</td>
</tr>
</tbody>
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